Song: "Sir Duke"
Artist: Stevie Wonder
Peak position on the Cashbox Singles chart: #1
Number of weeks on the Cashbox Singles chart: 16
Weekly data:
| Week ending | Rank | Title | Artist | Label |
|---|---|---|---|---|
| April 2, 1977 | 67 | Sir Duke | Stevie Wonder | Tamla 54281 |
| April 9, 1977 | 43 | Sir Duke | Stevie Wonder | Tamla 54281 |
| April 16, 1977 | 27 | Sir Duke | Stevie Wonder | Tamla 54281 |
| April 23, 1977 | 21 | Sir Duke | Stevie Wonder | Tamla 54281 |
| April 30, 1977 | 14 | Sir Duke | Stevie Wonder | Tamla 54281 |
| May 7, 1977 | 9 | Sir Duke | Stevie Wonder | Tamla 54281 |
| May 14, 1977 | 5 | Sir Duke | Stevie Wonder | Tamla 54281 |
| May 21, 1977 | 2 | Sir Duke | Stevie Wonder | Tamla 54281 |
| May 28, 1977 | 1 | Sir Duke | Stevie Wonder | Tamla 54281 |
| June 4, 1977 | 3 | Sir Duke | Stevie Wonder | Tamla 54281 |
| June 11, 1977 | 12 | Sir Duke | Stevie Wonder | Tamla 54281 |
| June 18, 1977 | 22 | Sir Duke | Stevie Wonder | Tamla 54281 |
| June 25, 1977 | 36 | Sir Duke | Stevie Wonder | Tamla 54281 |
| July 2, 1977 | 47 | Sir Duke | Stevie Wonder | Tamla 54281 |
| July 9, 1977 | 47 | Sir Duke | Stevie Wonder | Tamla 54281 |
| July 16, 1977 | 75 | Sir Duke | Stevie Wonder | Tamla 54281 |
Rankings greater than 100 are from the Cashbox 'Looking Ahead' charts.